TY - JOUR
T1 - Comparison study the particulate matter characteristics in a diesel/natural gas dual-fuel engine under different natural gas-air mixing operation conditions
AU - Yang, Bo
AU - Ning, Le
AU - Liu, Bing
AU - Huang, Guyu
AU - Cui, Yanxing
AU - Zeng, Ke
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/3/15
Y1 - 2021/3/15
N2 - The particulate matter emissions have seriously negative effect on the human health, especially the ultrafine particulates and an experiment study has been conducted to evaluate the particulate emissions characteristics in a diesel/natural gas dual-fuel engine. In this paper, the particulate mass (PM) and particulate number (PN) concentration as well as particulate size distributions (PSD) characteristics under different natural gas-air mixture state operation conditions are investigated. The earlier (−500°CA ATDC, −480°CA ATDC) and later (−260°CA ATDC, −240°CA ATDC) natural gas injection timings are applied to form a homogenous and stratification natural gas-air mixture and the air fuel ratio (AFR) are maintained at a constant value during experiments. The results indicated that the natural gas-air mixture state have significant influence on the combustion process. The PN, especially ultrafine particulate emissions, is sensitive to the natural gas-air mixture state and the stratified-like mixture is benefit to reduce the PN of smaller size under low load. Moreover, in the diesel/natural gas dual-fuel engine, over 60% of the PN emissions are the ultrafine particulate while it just contributes to no more than 10% in the PM emissions.
AB - The particulate matter emissions have seriously negative effect on the human health, especially the ultrafine particulates and an experiment study has been conducted to evaluate the particulate emissions characteristics in a diesel/natural gas dual-fuel engine. In this paper, the particulate mass (PM) and particulate number (PN) concentration as well as particulate size distributions (PSD) characteristics under different natural gas-air mixture state operation conditions are investigated. The earlier (−500°CA ATDC, −480°CA ATDC) and later (−260°CA ATDC, −240°CA ATDC) natural gas injection timings are applied to form a homogenous and stratification natural gas-air mixture and the air fuel ratio (AFR) are maintained at a constant value during experiments. The results indicated that the natural gas-air mixture state have significant influence on the combustion process. The PN, especially ultrafine particulate emissions, is sensitive to the natural gas-air mixture state and the stratified-like mixture is benefit to reduce the PN of smaller size under low load. Moreover, in the diesel/natural gas dual-fuel engine, over 60% of the PN emissions are the ultrafine particulate while it just contributes to no more than 10% in the PM emissions.
KW - Combustion performance
KW - Dual-fuel
KW - Natural gas-air mixture state
KW - Particulate emissions
KW - PN
UR - http://www.scopus.com/inward/record.url?scp=85097374511&partnerID=8YFLogxK
U2 - 10.1016/j.fuel.2020.119721
DO - 10.1016/j.fuel.2020.119721
M3 - 文章
AN - SCOPUS:85097374511
SN - 0016-2361
VL - 288
JO - Fuel
JF - Fuel
M1 - 119721
ER -
